Printing problems using Illustrator CS6 (Mac)

hi,

 

i'm having trouble using illustrator cs6. bought hp laserjet cp1025nw color printer. operating system mac os x 10.6.8.

 

i've printed 2 different format files (.ai , .png) in illustrator, there white lines (without printing) ocurring in exact same place on both documents, this only happens in illustrator, not photoshop or other software. i did test using exactly the same .png file in many applications, except illustrator, the file printed perfectly.

i asked hp help, but is a problem caused by illustrator cs6 and can't do it.

 

what can solve problem? please me?

i've installed latest update of software.

 

thanks in advance.

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