i need some help with my addon

[AN-net]

im currently constructing an addon for vb2 and since there is no help me finish forum anymore i guess ill post here.

anyways i made an addon for showthread.php. well here we go:
this is the error i get:

Parse error: parse error, expecting `T_STRING' or `T_VARIABLE' or `T_NUM_STRING' in /home/anima22/public_html/community/showthread.php on line 485

line 485 is this:

PHP Code:

$qaasshow="The file:$qassg['filename'] what posted by $posts['postusername'].<br>To view this file go <a href='attachment.php?attachmentid=$qaasg[attachid]'>here</a><br><form action='qaasupdate.php' method='get'><input type='hidden' name='attachid' value='$qaasg[attachid]' size='10'><input type='radio' name='qaas' value='1'>Approve&nbsp;&nbsp;<input type='radio' name='qaas' value='2'>Disapprove&nbsp;&nbsp;<input type='radio' name='qaas' value='3'>Delete<br><input type='submit' value='Update Attachment'></form>"; 


and i attached the entire modification i made