Opera Mini 4 and Nokia 5300 (s40) - Connection Error

Hello,
I have a problem connecting Opera Mini 4 on my Nokia 5300.
My connection is Spice Telecom (Karnataka)

Opera mini 3 works very fine on my phone.
But, I don't know what, mini 4 doesn't connect at all!!

I've heard that this is a problem with all s40 3rd Edition phones.

Has anyone had any luck accessing Opera Mini 4 on an s40 3rd Edition phone (preferably, Nokia 5300 )

I couldn't find any solution to this on the web. Hope to find an answer to my trouble.

Thanks in advance.

Vinay.