If you have the exact vendor name or a hash of the comlite32.dll file, further specific documentation may be recoverable from Internet Archive or specialized industrial automation forums.
If you cannot find the original DLL, consider: Comlite32 Windows Xp
A: Close other programs using the same COM port (HyperTerminal, modem dialer). Reboot XP if needed. If you have the exact vendor name or a hash of the comlite32