Problem with "Show items with description like"

[den_crane]

I created item:
Description: oracle.$1 $2
Key: oracle[usercount]

Look to: Monitoring\Latest_Data\ Group - ALL \ Host - ALL \ Show_items_with_description_like - [Blank]

[B]Host  Description[/B]
Host1 oracle.dbfilesize
Host1 oracle.usercount
Host1 heart beat
Host2 oracle.dbfilesize
Host2 oracle.usercount
Host2 heart beat

If assign [Show_items_with_description_like = oracle] frontend filter:

[B]Host  Description[/B]
Host1 oracle.dbfilesize
Host1 oracle.usercount
Host2 oracle.dbfilesize
Host2 oracle.usercount

but if assing [Show_items_with_description_like = oracle.usercount] frontend show empty table:

[B]Host  Description[/B]

ZABBIX 1.1.2