problem with childObjects

[hadar]

This is a code I try on facebook page after I login:

print Browser("Facebook").Page("Facebook").Link("Yossi Birenboim").Exist

Code:

Set oDesc = Description.Create
oDesc("micclass").Value = "Link"
oDesc("text").Value = "Yossi Birenboim"
Set childs = Browser("Facebook").Page("Facebook").ChildObjects(oDesc)
Set child = childs(0) ' Cause general run error
print err.number '

The output is :
True
-2147467259