BSP Exception , with aliased page?

Hi all,

I got a BSP page at :

http://WAShost/sap/bc/bsp/sap/zris/page_a.html

I've an aliased version too at :

http://WAShost/ris/page_a.html

this work OK.

Now I copied (in SE80) page_a.html to page_b.html.

http://WAShost/sap/bc/bsp/sap/zris/page_b.html works OK but http://WAShost/ris/page_b.html give me the following error:

What happened?
Call of BSP page terminated due to error.
 
  
Note

Following error text processed in system:
BSP Exception: Das Objekt page_b.html in der URL /ris(bD1lbiZjPTMwMyZ3PTgwMTAwMDAr)/page_b.html ist nicht gültig.
  
Error Type: 

Your SAP Business Server Pages Team
 

Thanks in advance, for you help.

Message was edited by: Erik Gugliandolo