Online PF E-return

Dear Sir...
I need assistance in Filling PF return online.... m not able to file my pf return for the financial year 2011-12. when m submitting the txt file .. m facing errors..... mostly error code 001. i hve done everything which was shown in csv demo....... but still not succeded... pls help...
vikash

dear Vikash,
first i want to tell you that, Yearly return for the period 2011-12 will not submit through ECR. ECR is only for the Monthly contribution of march-12, which will paid in April. so don't confuse about it.
Annual return will send through E- return tool, in which you have to send the text file through CD and a hrad copy of 3A & 6A

Hi Everyone?
Please tell me how can i print 3A & 6A i have complete all entry in E-Return Toll p.f. that create the text file but no any pdf or word file for print out the 3A & 6A
Please Help.
Devendra Singh

my Self Rohit
Executive HR in MNC Company
Could you Please tell me How Can i Submit me EPF Returns on line