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Matrix Multiplication With Complex Numbers

i was trying to multiply 2 by 2 matrix using complex numbers, but im getting "#value" as the answer. i used =mmult(array1,array2) function and Ctrl+Shift+Enter. But its still showing "#value" as the result. I even wrote the complex number "i" as =complex(0,1). like the matrix is
A = 1 i (1st row of A
i 1 (2nd row of A
B = 4 (1st row of B
3 (2nd row of B
So how do i write the function to multiply Matrices A by B. Can somebody help me out on how to do this?
thanx in advance.

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