After you installed the JDBC driver from i-net software please check if your config.xml (located in the config directory of your WebSphere application server) contains
jtaEnabled=“true”
.
<resourceProviders xmi:type="resources:JDBCDriver" xmi:id="JDBCDriver_3"
name="i-net Opta" description="MS SQL Server XA driver from i-net"
implementationClassName="com.inet.tds.DTCDataSource">
<urlPrefix xsi:nil="true"/>
<factories xmi:type="resources:DataSource" xmi:id="DataSource_9" name="O"
jndiName="jdbc/sqlserver" jtaEnabled="true"
statementCacheSize="100" defaultUser="sa" defaultPassword=""
disableAutoConnectionCleanup="false">
<propertySet xmi:id="J2EEResourcePropertySet_9">
<resourceProperties xmi:id="J2EEResourceProperty_15" name="serverName"
type="java.lang.String" value="LocalHost">
<description xsi:nil="true"/>
</resourceProperties>
<resourceProperties xmi:id="J2EEResourceProperty_16" name="databaseName"
type="java.lang.String" value="master">
<description xsi:nil="true"/>
</resourceProperties>
</propertySet>
</factories>
<propertySet xmi:id="J2EEResourcePropertySet_1"/>
</resourceProviders>