[users] envelope printing

[Anntedlo]

Open Office (Word) has recently been installed in my PC. I am having  
considerable difficulty, however, printing envelopes. I want to default to a 
No.  10 
envelope, but I simply cannot make the printer produce a properly aligned  
envelope. I keep getting a message on my HP Officejet 6210 that I have not  
loaded the proper printing material.
 
Any suggestions.
 
Thanx,  Ted