Can't connect to some ISPs

I recently brought a Dynamode 56k PCMCIA modem from the Software Warehouse. Though it works with most ISPs, the one I would like to use most has told me today that I will need to contact the manufacturer and obtain codes to disable the V90. Is this necessary and how would I go about doing this ?
etecsid1Asked:
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rayt333Connect With a Mentor Commented:
This info came from the following site:
http://www.dynamode.co.il/pcmcia-modem.htm


Modem Initialisation String...  
 This is a string of commands Windows will run before dialing.  These are very important so be sure to read carefully.  There
 are init strings for both 56k and v90!

Select modem in your control panel, high-light your Dynamode modem and then click on Properties, then select the tab
Connection and then the button Advanced.  Change the text area below Extra Settings to ONE of the lines below.

What you are doing here is changing the modem init string.

Modify S38 or S109 by the init string:
ATS38=0 or ATS38=1 or ATS109=0 or ATS109=1 or ATS109=2

S38 - 56K Downstream Rate Selection for K56 flex/V.90 Mode
S38=0 V.90 or K56 flex disable
S38=1 V.90 or K56 flex autorate    (Default)
S38=2 29333bit/s
S38=3 30666bit/s
S38=4 32000bit/s
S38=5 33333bit/s
S38=6 34666bit/s
S38=7 36000bit/s
S38=8 37333bit/s
S38=9 38666bit/s
S38=10 40000bit/s
S38=11 41333bit/s
S38=12 42666bit/s
S38=13 44000bit/s
S38=14 45333bit/s
S38=15 46666bit/s
S38=16 48000bit/s
S38=17 49333bit/s
S38=18 50666bit/s
S38=19 52000bit/s
S38=20 53333bit/s
S38=21 54666bit/s
S38=22 56000bit/s

S109 K56 flex/V.90 Automode Selection
S109=0 V.PCM disable.
S109=1 K56 flex or V.90.  (Default)
S109=2 V.90 only.
 
 
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etecsid1Author Commented:
Adjusted points to 80
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OttaCommented:
The modem should self-disable V.90, if the ISP's modem indicates that V.90 is not available.
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