Looks like you need Camera Raw 4.6: http://www.adobe.com/support/downloads/detail.jsp?ftpID=4036
Look in the Camera Raw 4.6 ReadMe to see that the Sony A350 is supported.
The above link is the update for PC. You didn't say whether you have a Mac or PC.
The following would be the equivalent Mac update: http://www.adobe.com/support/downloads/detail.jsp?ftpID=4035
Yes, 4.6 will work, but if you want the most recent version of camera raw
for photoshop elements 6, that would be 5.6.
Oh, that's interesting! I wasn't aware multiple different major versions of Camera Raw would work with multiple versions of Elements. Thanks for the tip!