when u say "i sent my coins..." from where to where?
if it does not work, try:
1- close yellowcoin-qt.exe
2- open floder Appdata/roaming/yellowcoin, and make backup wallet.dat (save a copy somewhere on your computer)
3- open yellowcoin-qt.exe, and unlock if it's locked
4- open console (help -debug window - console)
tape this command
dumpprivkey Y9QGboVGghBVZA4o3diRUXGeAQyTCLn8RM
the result must be XM7GuEA32WepvCeHSGnBVcdddddddddddddddddddddddddddddddd9 (this is ur private key it's private dont post it here)
copy ur private key on notepad
5- repeat the same command with changed adress
dumpprivkey YJRPQGiptdKbZccTi8LLhuN5jSMVM7K6R7
copy paste the result. XM7GuEAttttttttttttttttttttttttttttttttttttttttttttddddddd9
(If this gives nothing proceed to the next step)
6- close yellowcoin-qt.exe, enter Appdata/roaming/yellowcoin and delete wallet.dat (or rename it)
7- reopen yellowcoin-qt.exe, a new wallet will be created.
8- open console and tape those command
importprivkey XM7GuEA32WepvCeHSGnBVcdddddddddddddddddddddddddddddddd9
repat with the second private key
importprivkey XM7GuEAttttttttttttttttttttttttttttttttttttttyyyyyyyyttttttddddddd9
9- close yellowcoin-qt.exe and reopen it.