Output text problem on a comment form

hi guyz,

I got a comment form on my designed site… http://phcci.coop/index.php?action=contact&reqno=9&content=109. Kindly check it out.
Now, the problem is that some comment are sent to database that cannot be read (literally).
Here’s how it appears… (below)
SUBJECT : NcZcZVKdHyn
OFFICE : (just looks normal)
COMMENT : maFfe2 <a href=“http://aaobykhkguux.com/”>aaobykhkguux</a>, iwhiluarewrd, [link=http://acmmwxvdfpfb.com/]acmmwxvdfpfb[/link], http://ckiawpmvfjah.com/

Can somebody tell me if its a virus or an ad?or something? Or it might a database structure problem? I just don’t have any idea on this.please help…tnx

regards,
Ed