Shipping tax

Hi,

I have a problem to get the tax of the shipping price to get added in the total tax on checkout.
The tax is included in the shipping price but NOT added so the total tax amount.
Like this:

subtotal: 5,000.00kr (we have 25% tax. tax=1,000kr)
Shipping : 250.00kr (we have 25% tax. tax=50kr)
Total tax included (25%): 1,000.00kr (here the 50kr from shipping is missing)
Total: 5,250.00kr (the total amount is right)

Anybody know how to get the shipping tax added to the total included tax?

Regards,
Leffe