WAS 6.10 problem

I have a DEMOSYSTEM installation with the following data:

SAP System ID: WAS; Operating System: Linux

SAP Release: 6.10; Database: SAP DB

When I try to create the user DEVELOPER copying it from the user DDIC i get the following error message "system lock administration error" and I can't continue.

Why? I follow step by step the installation notes in the cd rom to create a user for developing.

I notice that when I try to create e new program i get the following error message "Change and Transport System not configured". What it means? What can I do?

Please help me!

I'm waiting for your answer a.s.a.p.

Thank's in advance

Best regards,

Andrea Gigliotti