Network Problem

I am using on both Computers Endnote X5.0.1, but on one of them I can’t open the .enl files from the network we are using at work.
It keeps showing the message “Endnote error”. On both Computers is Windows 7 32-bit installed, on the one I have problems is the enterprise version installed (if this info might be helpful). I really tried everything like exporting the registry or firewall config., but it didn’t help. 
I would appreciate your help. Thanks!