When I turn on the phone it says "Memory Card not Formatted." I go into options and select memory card- it says "Cannot read memory card. Verify that the memory card is formatted." If I click in that area I can choose FORMAT- but then it just hangs and I have to reinstall the battery for it to turn back on...to which I get the same message!..Cannot read memory card.... It is a 4mb Sandisk SDHC card- I've read that other have used this card successfully- my software is up to date v4.5...which I've read can support up to 8mb without issue.