Acceptance rates in MH chains

Hi all,

I would greatly appreciate your help with the following issue I have been having.

When I am doing MCMC simulations, for the two MH chains, I get very different acceptance rates. For example, for the current run I got 0.2122 for one and 0.0084 for the other. As a result, the results are completely unreliable, there is no convergence between chains, and so on. Can anyone please suggest as to what might be causing this?

Thanks in advance.

Sounds weird! Can you post your code & data?