Two network cards, software conflicting

Hi.  I have a PC that is a client to our POS Server.  On this PC it has an integrated NIC and I added an external NIC.  The internal/integrated NIC is on the IP Scheme of the POS Server.  It also has a mapped drive for a program that resides on the POS Server.  The other NIC is used to get access to our Backend network which is on another IP Schema.  Both IP ranges and subnets are different.  
The problem is that when you first log in, it wants to connect mapped drives to the POS Server.  This will let the program run that we need to do price changes.  THe problem is that if both NICs are enabled, the program will not run.  We have to disable the second NIC (to the backend network) to get the other one to work properly.
I checked IRQ conflicts.  Each says they are on different IRQ's.  So if I have the network NIC disabled when logging in, the program will o pen.  Then I am able to enable the backend Network NIC to get internet access.  The issue is that if both are enabled it will conflict.
Any suggestions on this.  Ive stacked the NICs so that the NIC running the program through the mapped drive to the POS server is on top.
But nethertheless, no success in both of them working.
cjjimbosAsked:
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Irwin SantosComputer Integration SpecialistCommented:
Can you change the scheme to something else?

IP Address. . . . . . . . . . . . : 10.0.0.50   (STATIC IP ADDRESS-part of network Domain)

10.0.0.50 to

192.168.1.100 ?

subnet 255.255.255.0
gateway 192.168.1.1
dns 192.168.1.1

by doing so, all other workstations need to reflect the above change, hopefully you have a handful and not many..


OR have DHCP automatically assign that station and IP
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Irwin SantosComputer Integration SpecialistCommented:
make one or both  of the nics static....

following the schema for your network...

NIC 1 receive IP via DHCP

OR

NIC 1:   IP  192.168.1.50, subnet 255.255.255.0  gateway 192.168.1.1  (guessing here, post your IPCONFIG/ALL)


AND

NIC 2:  IP  192.168.1.51, subnet 255.255.255.0 gateway 192.168.1.1


again post  your IPCONFIG/ALL please
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cjjimbosAuthor Commented:
C:\>ipconfig /all

Windows 2000 IP Configuration

        Host Name . . . . . . . . . . . . :XXXXXXX1
        Primary DNS Suffix  . . . . . . . :
        Node Type . . . . . . . . . . . . : Hybrid
        IP Routing Enabled. . . . . . . . : No
        WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter Network-Email:

        Connection-specific DNS Suffix  . :
        Description . . . . . . . . . . . : Linksys LNE100TX(v5) Fast Ethernet Adapter #3
        Physical Address. . . . . . . . . : 00-04-5A-88-3E-FB
        DHCP Enabled. . . . . . . . . . . : No
        IP Address. . . . . . . . . . . . : 10.0.0.50   (STATIC IP ADDRESS-part of network Domain)
        Subnet Mask . . . . . . . . . . . : 255.255.255.0
        Default Gateway . . . . . . . . . : 10.0.0.100
        DNS Servers . . . . . . . . . . . : 10.0.0.1

Ethernet adapter Local Area Connection:

        Connection-specific DNS Suffix  . :
        Description . . . . . . . . . . . : Intel(R) PRO/100 VE Network Connecti
on
        Physical Address. . . . . . . . . : 00-07-E9-F3-8C-F0
        DHCP Enabled. . . . . . . . . . . : No
        IP Address. . . . . . . . . . . . : 10.2.2.102    (STATIC IP ADDRESS-POS SYSTEM, no domain)
        Subnet Mask . . . . . . . . . . . : 255.255.0.0
        Default Gateway . . . . . . . . . :
        DNS Servers . . . . . . . . . . . :

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cjjimbosAuthor Commented:
Remember, each NIC is connected to two different networks, The 10.0.0.50 is the our company network domain.  The 10.2.2.102 is our POS system which is in a work group, thats why there is no DNS or Gateway.
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Irwin SantosComputer Integration SpecialistCommented:
the 2nd subnet doesn't seem to be valid.  can you confirm that 255.255.0.0 is correct?
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cjjimbosAuthor Commented:
It is correct!  The people that set up our network (workgroup) used that subnet.  Do you think this is what is causing issues?
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cjjimbosAuthor Commented:
ANybody there?
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cjjimbosAuthor Commented:
Ill try that and let you know
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cjjimbosAuthor Commented:
Seems like it has been a motherboard issue with drivers.  Replaced motherboard and put external NIC with different drivers.  No more conflicts.
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