Hello micronda.
If you are in the exact same case, here is what i did to solve it :
- go to settings of the wp-client module
- in general > and select "no" to this option "Hide dashboard/backend from clients and client staff"
This way and i don't know exactly why, the woocommerce or jigoshop ecommerce module work. It's often a permission problem
Tell me if it's solve your problem too