Wizard PCR purification from agarose gel

[ruth e.w. walker]

I am unable to purify my PCR product from the gel using the Wizard kit. 
It works well when I purify directly from the PCR rxn. I use 2% agarose, 
which melts within 4 min at 65C in presence of the resin. Is that too 
long? Too short? What else could be wrong, given that it does work with 
the PCR rxn, done concurrently?