Unable to stay logged-in to Identity Safe Vault

Today I am unable to stay logged-in to Identity Safe vault.  I am not closing Firefox but I am constantly told that I am not logged and and need to re-enter my password.  When I do this I find I have to enter this information twice, firstly for my Norton account and then for the vault.  I do this and shortly after it again states that I am not logged in and I must do all this again.

Is there any way of remedying this?