Netweaver install + crm AND erp

Hello,

i've installed crm 7.0 and erp (latest) on Netweaver 7.01.

Unfortunately if crm is started, erp will not start. And if i start erp first, crm will not start.

What settings do i have to make to make this work?

All installs (nw,crm,erp) are made on the same disk (d:\) and quite standard.

Hope any one you know a solution.

Kind regards,

Bas Masteling