How to Enable Samsung B5510 Galaxy Y Pro Mobile Tethering

I own a Samsung B5510 (Galaxy Y Pro). This phone has Wifi hotspot capability. I’m able to activate the Wifi Hotspot,
And it is discoverable on most units. However, I’m unable to browse form other units or other devices.
When they are tethered to my B5510. My data access is active, and I am able to browse from the phone itself.
Is there something wrong with the phone?
How come I’m not able to browse using other units when tethered to my phone?
