Don't use mouse over, set it to go there on button click. If it's a text link, you change that object to a symbol and set it to be a Button type. Then set the GetURL action for the symbol and it will automatically interpret this as an OnClick action.
Hint - using text in this way is a bad idea, as the clickable portion is only the letter shapes, not the space around them. I use text graphics instead, using Fireworks to create a PNG image with a transparent background and importing that as an object.
safeTsurfa Stay alert! Stay safe! Stay alive!