Karnataka c-tax c-form auto generation

Hi,

As per the directions of the dept. I have uploaded cst interstate purchases for Q4 2012-13.

However, I am unable to generate c-forms. I get the message "This option is not available currently."

It is of no use going to the LVO

Please help. Am I the only one having this problem?

Moreover, what is the due date for submission of c-forms

Thanks in advance

Jothi