Local connection - AS2.0 - AS3.0

i have one actionscriptt 3 file with oops applied to it via document class.
i have another action script 2.0 file , in which th etime line contains a localconnection code… i cannot catch that code by creating a local connection in the actionscript 3.0 class… why ?

Error #2044: Unhandled AsyncErrorEvent:. text=Error #2095: flash.net.LocalConnection was unable to invoke callback ldrFramePosition. error=ReferenceError: Error #1069: Property ldrFramePosition not found on flash.net.LocalConnection and there is no default value.

can some one help ?