find error in my Validate-function (that validates a textbox)

Hello

I'm a newbie with VBA who needs your help.
I have created a userform that has several textboxs within it and an OK-button.

In the OK-button I have the following code:

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The problem I'm having is with the Validate-function, see code below:

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I have only pasted 1 If in the validate function here since the problem is the same for them all, and that is that even if the textbox txtProductName containing for example "Coca Cola", I still get the msgbox "please enter a product name".

What am I doing wrong? I seems to me that the variable ValidateData never get True but I do not understand why.

Thank you for your help, and a great forum.