I've got this RCA universal remote that I'm trying to get working with a Toshiba M-651C VCR.

Sorry about the flash glare, but you can see that there's no Code Search button, and no Enter button. There's a SEARCH button, but (a) I get the feeling that it's part of the TV controls, and (b) even if it worked as Code Search, I don't see how to "fix" a searched code without an Enter button.
I've tried keying in the numerical codes for Toshiba VCRs, but none of the 3-digit codes work. I saw another thread linking to 2-digit codes for RCU500 variants, but they didn't work either.
Any suggestions? I suppose it could be a problem with the M-651C, but that works OK with its own remote.
Thanks.