> When I run my App through NetBeans I get a
> java.lang.UnsupportedVersionError saying that the
> major and minor version is incorrect. I downgraded
> from v5.0 SDK back to 1.4.2_01 to test everything,
> but to no avail. Any1 have an idea about this?
You seem to be using different versions of JDK for compiling and executing. Try recompiling and executing with the same JDK version.
> Tried that already. No difference. Should I maybe
> format my PC and try again?
Whatever, but the prior answer is correct. You compiled using version 1.5 and are trying to run using version 1.4, and 1.4 doesn't recognize/know what to do with/know anything about version 1.5. source code.