Svn configuration in new stack

Hi,

I've updated my server that was runing with a Redmine 1.3.0 stack to a new one, a Redmine 2.3.1. The case is that I had my svn repositories created under /var/svn folder and after changing the stack they are read-only. I can access and browse them but I can't commit... The error says:

Can't open file '/var/svn/....../db/txn-current-lock': Permission denied

Does anyone know what can happend?

Thanks in advance!