i want to withdrawn EPF. Pls Help……….,?

frd……., i have a epf a/c no up/gkr/0048144/006 i am resigning my job nov.2011 but my boss is not interested in my EPF form Signature. my pf is in up gorakhpur and now i am in delhi so how i can withdra a epf amount i dont remember my joining date but i remember my leaving date. pls help me,,,,,,
nd suggest me what is the simple procedure