An Error Occurred during Submit Process. Cannot Process content of type text/html

Hello All,

I am submitting the form data to server using HTTP submit button. I am stuck in a weird situtation:

When I fill the form and click submit and my Firefox is open than I get this error "An Error Occurred during Submit Process. Cannot Process content of type text/html". However the data get submit to server and stores into the DB

If Firefox is closed then I get Confirmation (echo) via IE.

I tried everything but some how I am not able to figure out this problem.

Can any one please guide me or tell where I am going wrong?

Thanks

Viral