On Windows 7 (32bit and 64bit);

we are getting the following;

Error Message : A problem encountered while attempting to add the driver to the store.
Error Group: Windows
Error Code: -2146500025

We are using;
NetWare 8 sp2b
iPrint client 5.44
Kyocera FS 4020DN

Please advise as to why this is happening?

Windows XP is fine