[R] searchTwitter with unicode- UTF8

[Ragia Ibrahim]

Dear group
I uses 'searchTwitter'  to get users tweets it works  for English words such as ("iphone")
but when working with Arabic   text
example
searchTwitter("ÓæÑíÇ")   it gave me the following Error

Error in twInterfaceObj$doAPICall(cmd, params, "GET", ...) : 
  Error: Forbidden


my questions  are
how to make it understand the unicode characters?
and if It is a hashtag should I write it that way "#ÓæÑíÇ"

many thanks in advance
Ragia
 		 	   		  
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