BlazeDs General Messaging Error

hey to all,

I am trying to call a method from server side; that I wrote in Java and deployed to tomcat via BlazeSpringFactory.
When I call that method from flex i get this error:


BlazeDS][ERROR] [Message.General] Error handling message: flex.messaging.MessageException: Cannot invoke method 'getAssetDevices'. Method 'getAssetDevices' not found.
incomingMessage: Flex Message (flex.messaging.messages.RemotingMessage)
operation = getAssetDevices
clientId = D57B6468-1108-8A53-A9DA-E81FBFC9AAB1
destination = NousfluxService
messageId = 4A7FEC2B-0F48-A8B6-FEBC-31DA4F153758
timestamp = 1220607102936
timeToLive = 0
body = null
hdr(DSId) = D57B6382-930B-05E6-5ED3-207959DD7E53
hdr(DSEndpoint) = my-amf
errorReply: Flex Message (flex.messaging.messages.ErrorMessage)
clientId = D57B6468-1108-8A53-A9DA-E81FBFC9AAB1
correlationId = 4A7FEC2B-0F48-A8B6-FEBC-31DA4F153758
destination = NousfluxService
messageId = D5B5FCF3-3A0B-C271-13B3-1C122AE53D05
timestamp = 1220607102938
timeToLive = 0
body = null
code = Server.ResourceUnavailable
message = Cannot invoke method 'getAssetDevices'.
details = Method 'getAssetDevices' not found.
rootCause = null
body = null
extendedData = null



however, I have already called other methods from my service, NousfluxService; and they r working well.

what is the problem with this method , 'getAssetDevices' ?

please help