Second letter capital of a variable value is coming null in server side.

I am using "Axis2_Service_Archiver_1.3.0" eclipse plugin to deploy and publish my service in tomcat 6.0.14.
In that one method takes the Object input and that object has 7 variables.
Now the issue is when i call the services from my client side app. one variable value is coming null in server but others are working correctly.
That variable's 2nd letter is Capital letter is it the problem ?
Variable name is "mCouponCode" .

Other variable like 'redeemDate' are working correctly.

In WSDL file it looks like below. (I have pasted the wsdl part here)

------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
<xs:complexType name="RedemptionUpdateRequest">
<xs:sequence>
<xs:element name="last4digitsOfCardNo" nillable="true" type="xs:string"/>
<xs:element name="mCouponCode" nillable="true" type="xs:string"/>
<xs:element name="mobileNo" nillable="true" type="xs:string"/>
<xs:element name="pvrTxnId" nillable="true" type="xs:string"/>
<xs:element name="redeemDate" nillable="true" type="xs:string"/>
<xs:element name="redeemLocation" nillable="true" type="xs:string"/>
<xs:element name="redeemTime" nillable="true" type="xs:string"/>
</xs:sequence>
</xs:complexType>

------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------