With which version did you create your two volumes?
Do you use automatic detection for the PRF or do you explicitly choose the right PRF? To avoid errors, set PRF selection to auto-detection.
Do you only use a password and you also have key file? What are the caractéristics of your password (length, composition,...)?
Did you enter a value of PIM?
Another user suggested to start by changing the password to a simple value (eg eeee) and then try to mount the volume with this simple password. Is it working for you? If so, you can set the password to a complex value and try again.
Thank you in advance for your feedback on these points.
Thanks for your tips. Can we talk on ICQ/skype?