help about ARPACK solver

Hi,

I am now involved in a computational electromagnetics project and have
to obtain a few eigenvalues and corresponding eigenvectors of a large
non-symmetric complex matrix (2K-by-2K).

I know ARPACK solver is a good choice, and it works now. However, when
I compare the eigenvectors from my fortran program and Matlab given by
EIGS, I found a big mismatch between them, (but the eigenvalues are
OK.) This problem really confused me a lot. Can anyone help me about
this?

Thanks!

lorin

PS: The test matrix I used here is generated as following:

n = 2000;
mat_r = randn(n, n);
mat_i = randn(n, n);
mat = mat_r + 1i*mat_i;

.