Occasionally when you try to send funds you will receive the above error message. This occurs when your inputs are too small and thus the transaction occurs too many inputs.
You can solve this by sending yourself smaller transactions that sweep the inputs into larger outputs. For example:
Send yourself lots of 500 WGR continually. If this is too large, send lots of 250 WGR. This will sweep the smaller change addresses into larger inputs, which can then be used for an input for 25,000 WGR.