switch to retry message while running a server client application of visual basic in client and unable to complete the operat

In my network which has transaction srvers in load balancing. The application software is VB. In some situations my clients are receiving the message the system is busy with other operations switch to or retry buttons will apppear along with cancel but inactive button. Then they need to logoff and login again are cancel the application and need to start again. This will apper very frequently. Kindly advice me whether it is a network problem or server problem or application problem.
My network is with ATM switches and servers are netfinity 7100 series of IBM.
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dumamaheshAsked:
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dumamaheshConnect With a Mentor Author Commented:
This problem has been solved for me after 3 months of various solutions.

This is due to port auto negotiation. The IBM server NIC ports which are by default Hardware default are identifying by auto negotiation of switch as 100Mbps Full duplex but there working as half-duplex. I may be wroning in this perception.

But while i changed the configuration to strictly 100Mbps Full duplex and ports also 100 Mbps full duplex the problem is completely solved.
I tried to change back for other options but it is again giving problem. If your switch does not support 100 Mbps full duples. change it to 100Mbps half duplex in u r server NIC
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ToastieCommented:
I am having almost the same problem.  Does anyone have any ideas?  Please help.
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