EP7.0 MYSAPSSO2 Cookie are not accepted on NW04-Javastack

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Hello,

we have a SSO-Problem.

Systemlandscape:

Our customer have a EP7.0 SPS12 java-only portal for different companies.

One company wants to implement the business package for ECC5.0, because their SAPHR is a NW04 SPS21 doublestack without a portal. So we only use the webdynpro´s on this system.

Users have the same UID´s in both systems.

Doing:

We import the business package with roles, pages etc. in the EP7.0 portal. The plugins were installed on the javaserver NW04. In the EP7.0 Portal. First problem was the JSession. That was fixed by a note.

Now if we use the SAPTicket for login, we get the loginscreen from NW04-System, and the actual EP7 login is deleted. We can analyse this with firefox 2.0.9 and check the cookies.

But it works, if we set the login to UIDPW, so every user has to enter their credentials.

Can anybody explain, why the SAPTicket doesn´t work?

Are EP7.0 Tickets to NW04-Javaservers incompatible?

Best regards

Christian