st: Oblique Rotation returns no correlation between factors?

["I. Kuznetsov" <ik289@cam.ac.uk>]

Dear Statalisters!

I doing some research using factor analysis (principle axis factoring) 
using categorical data. I have used polychoric correlations to correct for 
the categorical variables problem. But now when I try to rotate obliquely 
using "oblimin" and use "estat common" to find the correlation between 
factors, Stata returns that there is 0 correlation, which is very strange. 
I have tried different extraction methods and different rotation methods 
and yet I still find no correlation. Any suggestions?

Thanks you,
Ivan Kuznetsov
Economics Tripos
University of Cambridge
*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/faqs/resources/statalist-faq/
*   http://www.ats.ucla.edu/stat/stata/