Scanning Error

I have a problem that is really bugging me. I have two Panasonic high-speed scanners (KV-S2055) and two Epson mid-speed scanners (GT-30000). Each scanner is connected to a different PC. We are running on a LAN network, with Windows 2000/NT. My problem is with the Panasonic scanners and Textbridge. I am unable to scan only 2 pages without the PC locking up. I can scan 1, 3, 4, etc. pages and have no problems, but 2 pages will not work. I have checked the Epson scanners and do not get this error. I have updated all the latest drivers (I think) and I am now lost. We are using Textbridge 9.0 Business Pro. Any thoughts or suggestions will be greatly appreciated. We can work around this "bug" by scanning an extra sheet when needed, but I want to know "why" it is doing this. THANKS FOR THE INPUT!!!