Speex dev - Jul 2006 - problem with encoding and decoding splitting

Hi Folks!
I'm using Speex in my program, to develope a program that makes use of a
multiple descriptions concept to encode and decode a WAVE file.. and here I have
the problems:
In my code I create two file splitting odd and even sample, and then I codify
them as done in samplenc.c.
I don't have any problems until here, but when I start with the decode part,
I have some problem. I have created two while, one to decode odd sample, the
other for the even sample. I don't have to problem to decode odd sample, but
it seems that after that the program can't decode anymore. It decodes also
the even samples, but it inserts some errors in the decoded file. And the
strange is that if a comment the first while, the second correctly works.
I've tried to create new Speex structure, and to destroy the one used in the
first while, but nothing happens..
If someone could help me..
Thanks a lot!