HP Designjet 1050c and 750c+ problems

Hallo people,

I download the last updated 1050c,750c+ and 560c HP Designjet drivers from HP website.

I have Windows-XP (SP2), AutoCAD2005-Ldd on HP-compaq computer.

My problem is: I use the autospool option and as a result I get
an empty spool file (only hpgl/2 headers, but no data) if I use the 1050c or the 750c+ drivers ( the 650c has no problems).

This problem with the above two drivers is unstable, because sometimes (if I produce the print from a layout) I get correct spool files and sometimes (if I produce the print from the model space) I get null spool files.

I also tried to produce the print to a file, but I get the same problem.

I have a lot of disk space and a big memory (512 mb) so there
is not space problems.

Because of this problem, my company cannot upgrade from 2002 to 2005.

Can someone has a solution???

Thank you.

Doron Shadmi