FrontlineSMS and Clickatell

[ben]

I have just done a fresh install of FrontlineSMS (v2.1.3) and have successfully created a connection with Clickatell from within FLSMS. The clickatell account has plenty of credit and is configured to use the HTTP API. Unfortunately I can't seem to send a message, I have experimented with different formats for international numbers (eg. 00677..., +677..., 677...) but all sent messages appear in the 'pending' folder and report a 'failed' status. I have tried with both the Windows and MAC versions of FLSMS and encounter the same problem. The logs report the following error:

2012-09-28 14:12:24,202 [Camel (camelContext) thread #11 - seda://out-1] ERROR seda.SedaConsumer - Error processing exchange. Exchange[Message: Congratulations+from+FrontlineSMS+%5Co%2F+you+have+successfully+configured+Clickatell+to+send+SMS+%5Co%2F]. Caused by: [org.apache.commons.httpclient.URIException - Invalid query]

Any assistance would be much appreciated.

Cheers, Ben.