How to trade between blue and Silver (read the message body before posting)

For some reason it won't work. I have the time machine, and the parcel. WHen it comes to please wait, Silver sais "your friend is not ready." I don't have any johto moves or pokemon in silver. Then i heard it'll only work with a GBC (Game Boy Color.) I use an SP and a GBA(x2). Is that true? And some people say GBC cables will work on GBA and others say it won't.

i really dont know i never tried it but i wanted to and they say if you use the time machine on yellow with gold or silver and trade the pikachu starter to gold or silver it will obtain the light ball

Thats useful since I got the cable and it works! Blue and Yellow Pokes shall now be in my Silver.