Problem when application starts

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Hello,

I'm creating an application in Webdynpro:

1 - Create a model for BAPI_CURRENCY_GETLIST using an Adaptative RFC.

2 - Create an app. using this model.

3 - Connect the R/3 system to de SLD:

a. Configure the Data Supplier Bridge with Server name of the R/3 and the sapgw00 Service.

b. Call the RZ70 transaction in the R/3 system and result is succefull.

c. A new Technical Landscape appears in the SLD.

4 - Configure the JCO connections:

a. Entry to the Web Dynpro Content Admistrator

b. Select the application.

c. Create each JCO Connection (MODEL and METADATA) using the Message Server just declared in the SLD.

After this, I obtain the next error then finish the creation of the JCO Connection:

Failed to create new JCO client connection RFC_METADATA: com.sap.tc.webdynpro.services.sal.sl.api.WDSystemLandscapeException: Error while obtaining JCO connection. at com.sap.tc.webdynpro.serverimpl.wdc.sl.SystemLandscapeFactory.getJCOClientConnection(SystemLandscapeFactory.java:140) at ...