Double integral fail, works on TI

[lrdheat]

I tried nInt(nInt((e^(-x*y))/sqrt(x^2_y^2),y,-x,x),x,0,1) on the physical G2 and the emulator on my iPad in home and CAS, and it tried a number of methods, all of which failed. This example came from the TI Nspire CX reference book for the non CAS (answer is ~3.30423). I tried it on my Nspire CAS emulator, and it came up with the result given in the book. The Prime solves a number of problems that are beyond the TI. Any idea on why the Prime stumbles with this type of double integral?