Internet / APN not working through usb dongle after rooting the micromax funbook P300

Hi,

I am unable to access the internet through USB dongle on micromax funbook after rooting it.

Now in APN setting I don't see default TATA profile and when I try to save a new APN profile, It shows saved but profile is not visible. I was able to access usb dongle internet earlier, I am not sure if this is something to do with rooting or I am doing something wrong.

Please advise how to fix this.