NDSolve differences between mathematica 8 and 9

[EnSlavingBlair]

Hello,

I am using mathematica 9 and having some problems with a particular expression, but when I tried it on mathematica 8 it worked perfectly. My expression is:

NDSolve[{D[T[n,z], n]+i 2 D[T[n,z], {z,2}]+z^2 T[n,z]==0, T[0,z]==1, Derivative[0,1][T][n,5]==0, Derivative[0,1][T][n,0]==0}, T, {n,0,5}, {z,0,5}]

where i is the imaginary number, and on both I had a new window to work on, with nothing having been done previously on it.

Mathematica 8 gave me this:
{{T-> InterpolatingFunction[{{0.,5.},{0.,5.}},<>]}}

and mathematica 9 gave me this:
NDSolve::ndnum : Encountered non-numerical value for a derivative at n==0.`.>>

Does anyone know what is going on here? I cannot use mathematica 8, as I do not have continual access to that machine.

Thank you for your help.

 

[EnSlavingBlair]

The imaginary number in my code was entered as :esc: I :esc: not as the lower case i.

 

[Hepth]

Don't escape "I" for imaginary. Just use capital "I". :I: is capital Iota.