How to connect using WPA2-Enterprise on Android Devices?
You might want to give the WiFi Config Editor a try, which gives you much more configuration settings to play with:

 
WiFi Config Editor (click images for larger variants)

I have not tried it (especially lacking an environment where I could really test it), but it might prove helpful, as you can adjust a lot of WiFi settings for a given AP here.

Remark: The app hasn't been updated for a long time, and obviously is no longer maintained. According to the comments, it's supposed to work fine up to Gingerbread (which would be fine for the device in question), but stopped working with ICS.

An alternative could be the WiFi Advanced Config Editor (aka "WiFi Ace"), which explicitly states:


  Set WPA Enterprise and Personal parameters, like wpa_supplicant allows you to



WiFi Ace (click image for larger variant)

You might note the screenshot looks quite similar to the first of WiFi Config Editor above, so functionality might be quite similar as well. While this app was last updated 2012, it might have the same limitation: its developer couldn't test it on ICS (Android 4.x), but it should work fine on GB (Android 2.x). Comments give not much clue here (except that the app seems no longer to be maintained), but several reports from 2012/2013 stating success might indicate it's still doing its job with ICS and up.