SLD permission problem by activation of SAP PI

Hi!

I am facing with the following problem when I try to access to SLD, meanwhile I log with J2EE_ADMIN user. This user has SAP_ALL profile.

You do not have permission to view the System Landscape Directory. Minimum required: UME role with permission com.sap.lcr.LcrUser and J2EE role LcrUser. See the SLD Post-Installation Guide for details.

What does mean the J2EE role LcrUser and how can I assign this role to user J2EE_ADMIN?

Thank you very much!

regards

Thom