How do I use Process.Start to open an IExplorer webpage from Excel using a command button?

I am very new at using Visual Basic so forgive my ignorance and I am sure this is probably a very simple task, but I have spent 2 hours this morning trying to research and test it and I keep getting an error when clicking the form button I added to my Excel spreadsheet to open up IE and go to a specific webpage when clicking this button. I just want this webpage to open up, then the user and type in their username and password on their own. So far I have the following:

Sub Button189_Click()
Process.Start ("C:\Program Files\Internet Explorer\iexplore.exe","https://westower.quickbase.com/db/main?a=SignIn")
End Sub

The name of my workbook is "iDEN PO tracker Phase 2.xlsm" and the worksheet is "Phase II - PO Tracker". I would like the user to simply click this form button and then have Internet Explorer open up to this specific web page. That all.

Can someone look at the 1 line of code and see why it won't work? I copied it from an example I found when searching "help" and added in my own file paths.

AWESOME AWESOME AWESOME... it works, .. the only thing I had to do extra was to "ENABLE COOKIES". It works perfectly!!! I knew it was something super easy and basic. I will learn this yet!!!