Jco Connection Error

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Hi All

While accesssing the Planning modeler from BI Java we are getting JCo

Connection Error.

I had maintained the JCO connection as below in WEB Dynpro Content

administration screen and the Jco Connection was working fine earlier

BI_MODELDATA

BI_METADATA

WD_ALV_MODELDATA_DEST

WD_ALV_METADATA_DEST

Now When i am going to WEB Dynpro Content Administration, Create JCO

Connection, Maintain Jco Connection and Start SLD Tab is grayed means i

can not select those option.I do not understand why this has changed

Can you Please tell me why this is happening this has happend third

times in last 2 months.This was working fine but giving error from

yesterday

I checked and found SLD is up and running

(http://<hostname>:<port>/sld).The Only Problem is Web Dynpro

Administrator is unable to connect SLD (The same situation is mentioned

in one PDF Guide when Create Jco Connection , Maintain Jco Connection,

Start SLd button is disable and got the message in the bottme of screen

Like " Connection to System Landscpae Directory (SLD) could not be

opened Successfully"). But there is no resolution given for this problemIn Visual Administrator also for service "SLD Data Supplier" when i

select this service in status basr "SLD_Collector_task" is showing in

Red.In the right window configuration Status for SLd is showing

as "Valid", only send Result is showing as "Failed"

In our case SLD is deployed Locally and again i want to mentioned this

was running fine after installation after maintaining the Jco connectionin WEB Dynpro Content Adminsitrator

Please help us on Priority basis as this is affecting our project work

Thanks in Advance

Thanks with regards

Deelip Kumar