what coin are you trying to mine? Block erupters/ASICs can only mine bitcoins/SHA-256 based cryptos? It can't mine Scrypt based cryptos.
Alternatively it can mine
MED (Mediterraneancoin) a coin that uses HybridScryptHash256 and employs CPU and ASICs to mine, at current difficulty you can find a block a day with 1 or 2 BEs.