Caching in

I am writing a widget plugin in wordpress 3.3.1 that modifies some jquery code that requires a cache folder. I set it up out of wordpress and it works great!

I’ve worked it into a widget, and this error comes in at the top:

Warning: ./cache/a4be6a41cf6b6178c08e44905a8568d0.spc is not writeable in /–address to file that wants to write to a cashe folder.

and the unformated rss feed appearing below.

any Ideas