Memory card. !! please help );

Don't know much about the Samsung phone; Can you put music on the 1 Gb memory card from another source (like a computer) and have it recognized by the phone?
Does the phone require music in a particular format? For example, if the phone recognizes .mp3 music files, but all your music is in Ogg Vorbis (.ogg) files, you will not be able to play them on the phone.

1) Find the Samsung phone manual (online?) and see if it requires music files to be in one format, or another.

2) Try loading music, in the proper format, from different sources onto your memory card.

Best of luck!