Why do I get stack overflow when my assembly code is called form a procedure but not main?

Question

Here is the code In question:

push 5
call Factorial

When I call this from main like this:

main PROC
    push 5
    call Factorial    
    exit
main ENDP

My code works fine, But if I call this as:

main PROC
    call Binomial
    exit
main ENDP


Binomial PROC
    push 5
    call Factorial
Binomial ENDP

I get a stack overflow at push eaxin the code below:

Factorial PROC
    push ebp
    mov ebp,esp
    mov eax,[ebp+8]
    cmp eax,0
    ja L1
    mov eax,1
    jmp L2

    L1:
        dec eax
        push eax
        call Factorial

    ReturnFact:
        mov ebx,[ebp+8]
        mul ebx

    L2:
        pop ebp
        ret 4

Factorial ENDP

I can not figure out why, but when I call it from main, the Factorial procedure exits as it should and returns to main, but when it is called from Binomial, instead of returning back to Binomial, it goes back to Factorial...which I find very odd. Am I doing something wrong here?