Hi Keletso,
1. Logon to your abap stack in the relevant client with user SAPJSF with the password you set to confirm the password is correct for this you will have to temporary change the user type to DIALOG.
Once logged on as SAPJSF and you know password is correct and logon working change user SAPJSF back to user type SYSTEM.
to my knowledge:
In NW2004 SAPJSF is Communication user Netweaver 7.0 i.e. 2004s onwards it is SAPJSF as System user.
2. Start your configtool to edit the user details as necessary:
http://help.sap.com/saphelp_nwce10/Helpdata/EN/0b/50ad3e1d1edc61e10000000a114084/content.htm
Go to Configuration –> cluster_data–> server -> cfg -> services ->Click on Propertysheet com.sap.security.core.ume.service ->Change the password in ume.r3.connection.master.passwd
Also check your user exists in correct client of backend i.e.
ume.r3.connection.master.client
And you need to check the user details in backend is correct i.e. GS1.
Kind Regards,
Johan