getListFeed with query error

[raffik]

Hello,
I'm getting an exception getListFeed($query) line is executed in this 
function:


public function getStudentRow() {

   $query = new Zend_Gdata_Spreadsheets_ListQuery();

 $query->setSpreadsheetKey($this->currKey);

 $query->setWorksheetId($this->currWkshtId);

 $query->setParam('xoauth_requestor_id', $this->data['teacher_email']);

$query->spreadsheetQuery = 'googlestudentid=\"'.$this->data['user'].'\"';

*$listFeed = $this->gdClient->getListFeed($query);*

if (count($listFeed->entries)==0) { // If student row does not exist  - 
create it

 $this->createNewRowFromData();

 $listFeed = $this->gdClient->getListFeed($query);

}

return $listFeed->entries[0];

}

I've found that whenever googlestudentid is set to a string that starts with 
a letter, the function call executes fine. However, when the googlestudentid 
string starts with a number (such as 95hy) the call fails and I get the 
following exception:

Expected response code 200, got 400 Parse error: Invalid token encountered

The var dump looks like the is the URL that's failing:

https://spreadsheets.google.com/feeds/list/tqBL7meh27WUGyg-aZkVoQQ/ocu/private/full?xoauth_requestor_id=xxxx%40xxxx.com&sq=googlestudentid%3D%5C%2295hy%5C%22

Now, the same call with a different googlestudentid works:

https://spreadsheets.google.com/feeds/list/tqBL7meh27WUGyg-aZkVoQQ/ocu/private/full?xoauth_requestor_id=xxxx%40xxxx.com&sq=googlestudentid%3D%5C%22h3hy%5C%22

Does anyone have any ideas?

Thanks!