hmm do you have a link I can look at? I dont use that part so I would have to see. You maybe able to change billspp_buttoninsert if its the one it is and try this
change the whole template to this
Code:
<!-- PayPal Donations Button -->
<div align="right"><a href="$vboptions[bburl]/paypal.php"><img src="$stylevar[imgdir_misc]/donate.gif" border="0" alt="Make payments with PayPal - it's fast, free and secure!" /></a></div>