Error Invoking Events Gateway Gatewayname: Null

1. created a gateway instance in CFadmin of with following information type Asynchronous CFML
Id = asynchr_submit
Path = H:\JL\TEST\cfc\asynchr_submit.cfc
Config file = H:\JL\TEST\cfc\asynchr_submit.cfg. I also tried with no config file.
(i also tried with config file cfc-method =onIncomingMessage and mode = saynchronous )

Gateway service enabled in settings

2. Config file has the following
mode=asynchronous
cfc-method=onIncomingMessage

3. Content of CFC (asynchr_submit.cfm)

<cfcomponent displayname="asynchr_submit" output="false" hint="Asynchronous CMFL gateway for Submit">
<cffunction name="onIncomingMessage" output="no">
<cfargument name="CFEvent" type="struct" required="true" />

<cfset email_txt = 'test email 2144'>
<cfmail to="email@email.com" from="email@email.com"
subject="Async test" cc="email@email.com">#email_txt#
</cfmail>

</cffunction>
</cfcomponent>

4. Calling cfml code
<cfoutput>
<div class="pagebody">
<cfscript>
status=false;
stTest = StructNew();
StructInsert(stTest, "Fname", "Test");
StructInsert(stTest, "lname", "Test again");
StructInsert(stTest, "email", "email@email.com");
status = SendGatewayMessage("asynchr_submit",stTest);
</cfscript>
<cfoutput>status = #status#
<cfdump var=#stTest#>
</cfoutput>
</div>
</cfoutput>

5. Error received from log is 05/18 08:33:20 Error [Thread-20] - Error Invocking CFC for gateway asynchr_submitL null
&. i even tried with only cfset insided my cfc. I apreciate your help.