This is a known issue with me as well Jody. What I do is break them up into groups of 10, because so many times it just won't send to more. It should look like this:

whata,schnujo,whata,schnujo,etc,etc,etc,etc,etc,etc

As simple as a comma. Nothing else is needed... and I put whata in the TO area, then i put the names in the BCC area; that way people won't see anybody's name but yours and theirs.

Good question!