Lost auto long in transactions

I have a recent problem in my SM, one hour to another all my sm_workcenter and lmdb lost the auto login and when i go to sso2 i have the message:

Issuing System for the Logon Ticket

SAP System PS1 Client 100

Certificate of the Issuing System for the Logon Ticket

Owner

Issuer

Serial Number

Validity

Check Sum

The Issuing System for the Logon Ticket Cannot Sign

Someone have some ideia what happen to my solution manager?

It was running perfectly until one day start to ask me every time my logon in the transactions, like, sm:workcenter or lmdb

BG