Cannot connect to internet with Huawei after upgrade from 10.7.4 to 10.7.5

I have an iMac which came with os X 10.7.4.When I installed my Huawei E303 data card, I was able toconnect to the internet.
After upgrading to 10.7.5 the system appears toconnect and I can text, but there is nointernet connectivity.
Thanks for any advice

Hi, this has worked for a few...
Make a New Location, Using network locations in Mac OS X ...
http://support.apple.com/kb/HT2712
10.7 & 10.8…
System Preferences>Network, top of window>Locations>Edit Locations, little plus icon, give it a name.
10.5.x/10.6.x/10.7.x instructions...
System Preferences>Network, click on the little gear at the bottom next to the + & - icons, (unlock lock first if locked), choose Set Service Order.
The interface that connects to the Internet should be dragged to the top of the list.
For 10.5/10.6/10.7, System Preferences>Network, unlock the lock if need be, highlight the Interface you use to connect to Internet, click on the advanced button, click on the DNS tab, click on the little plus icon, then add these numbers...
208.67.222.222
208.67.220.220
Click OK.

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