Magento multistore: currency problem - Euro/Pounds?

Hope someone can help me with a currency problem. I have a multishop, Dutch and English. The Dutch store (default config) is in Euro's and I want to get the Englisch shop working in Pounds. The two shops are multishops with different root categories and when I try to put the English shop at Pounds: system/configuration/currency setup it won't work.

开发者_如何学GoI put the display currency at pounds also with the frontend.

We are working with magento 1.4.0.1

Let me know if I do anything wrong?

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The following link says how to set up multiple currency for Magento shop. It also describes how to set different currency for different store.

Magento: Setup multiple currency shop

Hope this helps. Thanks.