Jackie: lines 2, 4 and 48 - empty lines (ok, non-visible symbol). Open the file in Notepad and remove these 3 lines. Save, copy to device, try again.
Iņigo: rxvt works because launcher points directly to the executable, but here and with RunDebug we work through a script . A guess would be stupid Windows messed Unix end-of-line chars in .sh file ..
I'm wrong, the problem is in the script.
Oh, and both scripts are produced by .. Iņigo