Hello Dumlu,
I've give you the same answer of anothe thread opened by Baha for similar issue
if the side with dynamic desirable puts itself in access mode all frames with a vlan tag different then the access vlan should be discarded.
the behaviour can be dynamic and depends from the fact that the other side can be willing to negotiate or not.
Another possibility is that DTP exchanges information about VTP domain if VTP domain changes a dynamic desirable port will not become trunk.
Hope to help
Giuseppe