Java - conexion jdeveloper con sql server

hola a todos:
tengo unas pag. jsp en jdeveloper 10g, me conecto a una bd remota en sql server 2000, no tengo ningun error en codigo, pero no me muetsra las pag y me sale el siguiente error:

07/05/29 13:18:29 GRAVE: ApplicationStateRunning.initConnector Error occurred initializing connectors. Exception is: Excepción al crear el pool de conexiones. Excepción: oracle.oc4j.sql.config.DataSourceConfigException: Unable to create : com.microsoft.jdbc.sqlserver.SQLServerDriver
07/05/29 13:18:29 GRAVE: ApplicationStateRunning.initConnector Stack trace: oracle.oc4j.sql.DataSourceException: Excepción al crear el pool de conexiones. Excepción: oracle.oc4j.sql.config.DataSourceConfigException: Unable to create : com.microsoft.jdbc.sqlserver.SQLServerDriver
at com.evermind.server.ApplicationStateRunning.initDataSourceConnectionPool(ApplicationStateRunning.java:2072)
at com.evermind.server.ApplicationStateRunning.initDataSourceConnector(ApplicationStateRunning.java:2017)
at com.evermind.server.ApplicationStateRunning.initConnector(ApplicationStateRunning.java:1272)
at com.evermind.server.ApplicationStateRunning.initConnectors(ApplicationStateRunning.java:345)
at com.evermind.server.ApplicationStateRunning.initializeApplication(ApplicationStateRunning.java:206)
at com.evermind.server.Application.setConfig(Application.java:439)
at com.evermind.server.Application.setConfig(Application.java:340)
at com.evermind.server.ApplicationServer.addApplication(ApplicationServer.java:1853)
at com.evermind.server.ApplicationServer.initializeDeployedApplications(ApplicationServer.java:1608)
at com.evermind.server.ApplicationServer.setConfig(ApplicationServer.java:990)
at com.evermind.server.ApplicationServerLauncher.run(ApplicationServerLauncher.java:131)
at java.lang.Thread.run(Thread.java:595)
Caused by: javax.resource.ResourceException: oracle.oc4j.sql.config.DataSourceConfigException: Unable to create : com.microsoft.jdbc.sqlserver.SQLServerDriver
at oracle.oc4j.sql.spi.ResourceAdapterImpl.createDataSourceConnectionPool(ResourceAdapterImpl.java:106)
at oracle.oc4j.sql.DataSourceUtils.getDataSourceConnectionPool(DataSourceUtils.java:326)
at com.evermind.server.ApplicationStateRunning.initDataSourceConnectionPool(ApplicationStateRunning.java:2053)
... 11 more
Caused by: oracle.oc4j.sql.config.DataSourceConfigException: Unable to create : com.microsoft.jdbc.sqlserver.SQLServerDriver

y otras cosas mas... podrian ayduarme o decirm en todo caso como solucionar esto.. gracias