Are the dlls in the GAC? You can try a repair of the installation to be sure. You can also generate a log of the installation and send us the resulting file, so we can verify if every thing is OK.
To obtain the log file , run the installer from the command prompt with the following parameters :
XceedComponents.exe /V"/L* <PathToLog>XceedComponents.log"
André
Software Developer and Tech Support
Xceed Software Inc.