Using CrmMoney in CRM 4.0 is Evil

When you need to use CrmMoney Class in CRM 4.0 I recommend that to use simple int instead.
Everything works fine until from some reason you need to change this field, When I deleted this field and created a new one with the same name but with other type, I get an error message "Microsoft.Crm.ObjectModel.MultiCurrencyPlugin Error".

I tried a lot of solutions that I found over the web but none of them helps me, So I deleted the entity and the connections, Create a new one and all works right.

So the conclusion is if you not must  use CrmMoney NOT use it!!!