Input Signal Out of Range - connecting Wii to Lenovo Monitor? - 1

I bought a Wii/PS3 VGA HDTV AV Cable to connect my Wii to my Lenovo ThinkVision L193P extra computer monitor through the VGA port, but connecting them gives me the error "input signal out of range" on the monitor. I know this means the monitor can't read the output from the Wii, but how do I fix this?