Try copying that file (LXBCPRP.DLL) to the following location: C:\WINDOWS\system32\spool\drivers\w32x86\3

Thanks for your reply to my problem. But the file "LXBCPRP.DLL" is already there. It is also in C:\WINDOWS\system32\spool\drivers\w32x86 \lexmark_z600_series73d8. Both are the same size and appear to be ok. Do you think it has anything to do with Firefox V4.0 and 64 bit stuff. The same printer will not work at all on my other system which is on Win7? Just a thought. Thanks for your help. If you think of anything else please reply.

If you've got a 64-bit OS, you can only use 64-bit drivers, but the OS can run 32-bit programs like browsers, so it shouldn't be a problem.

I'll try and research it for you and update this thread as soon as I can.

Lexmark has a live chat, email and phone support, details on their site @ http://support.lexmark.com/index?page=productSelection&locale=en&userlocale=EN_US

I couldn't find the error in their knowledge base though.

Many thanks. I appreciate your efforts. I will look around Lexmark and keep my ear to the site. And to you others who have the same problem, keep me in mind if you find a fix. I will post back here when and/or if I find a fix. Thanks

I have the same problem printing material viewed through Firefox. I have not found a proper fix but have discovered that first saving the document and then printing the saved version works for me. Not perfect but better than nothing.

Thanks for your reply. And thanks to all who took the time to help. The solution I came up with was to buy a new printer. The main problem appeared to be that all Lexmark drivers available would not work on 64bit systems nor Win7 nor ver 4.x. Lexmark Vista drivers partly worked. I found more issues when I upgraded to ver5.x a few weeks ago. but I found an add-on to help. It is "add-on compatability reporter 0.8.6". I did not go back to the old Lexmark printer, which is happy on an older XP machine. The add-on may have worked, but I didn't try as all my systems are running well using the add-on. If you D/L it and try it, I had a learning curve problem with it's install and use. Follow the directions carefully and be prepared to have odd results, but finally after install, it worked to perfection. I hope this helps those who still are having problems, and another thanks to all who helped me.