I assigned drive letters, changed & found no solution!
I installed virtual drives: farstone virtual drive & daemon tools
Now I uninstalled farstone virtual drive (But I don't think it's driver is uninstalled)
are these virtual drives' drives conflicting with pendrive path(But it is possible to assign only an unused path)
I have uploaded the DVD/CD-ROM drives from device manager
Edit: Moved topic from XP to the more appropriate forum. ~ Animal