I set it like this in mssql.ds file
<datasources>
<local-tx-datasource>
<jndi-name>NeoDataSource</jndi-name>
<!--
<connection-url>
jdbc:jtds:sqlserver://MATRIX;instanceName=NEO;databaseName=Neo_SWD_2009</connection-url>
-->
<connection-url>jdbc:jtds:sqlserver://MATRIX:1433//Neo_SWD_2009;instance=NEO</connection-url>
<driver-class>net.sourceforge.jtds.jdbc.Driver</driver-class>
<user-name>Neo</user-name>
<password>Oro12345</password>
<!-- optional parameters -->
<exception-sorter-class-name>org.jboss.resource.adapter.jdbc.vendor.MySQLExceptionSorter</exception-sorter-class-name>
<!-- should only be used on drivers after 3.22.1 with "ping" support
<valid-connection-checker-class-name>
org.jboss.resource.adapter.jdbc.vendor.MySQLValidConnectionChecker
</valid-connection-checker-class-name>
-->
<!-- sql to call when connection is created -->
<new-connection-sql>SELECT TOP 1 name FROM sysobjects</new-connection-sql>
<!-- sql to call on an existing pooled connection when it is obtained from pool - MySQLValidConnectionChecker is preferred for newer drivers -->
<check-valid-connection-sql>SELECT TOP 1 name FROM sysobjects</check-valid-connection-sql>
<transaction-isolation>TRANSACTION_READ_COMMITTED</transaction-isolation>
<min-pool-size>10</min-pool-size>
<max-pool-size>30</max-pool-size>
<idle-timeout-minutes>15</idle-timeout-minutes>
<blocking-timeout-millis>5000</blocking-timeout-millis>
<new-connection-sql>select 1</new-connection-sql>
<check-valid-connection-sql>select 1</check-valid-connection-sql>
<set-tx-query-timeout></set-tx-query-timeout>
<!-- corresponding type-mapping in the standardjbosscmp-jdbc.xml (optional) -->
<metadata>
<type-mapping>MS SQLSERVER2000</type-mapping>
</metadata>
</local-tx-datasource>
</datasources>
and i think this is write