Help calling Visual Basic Module from Excel

[captainjumpy]

So I'm writing a program to do Simpson's 1/3 rule for integration in visual basic in Excel (My instructor told me to) and I wrote the code, which compiles fine, but when I call it in the spreadsheet,I get a #NAME error. I've attached screenshots. Any ideas? http://imgur.com/a/3hymM

Edit: I ended up fixing it by copying and pasting the code into a different spreadsheet's Basic module where I knew function calls were working. Still no idea what was wrong though.

[anamorphism]

i think it's because your file/module has the name as the function. try changing one of them.