relation does not exist

Trying to run this query:

    UPDATE tblMonitor SET Make = 'Phillips' WHERE Make = 'Ph*';

get the error message that " Error:  relation "tblMonitor" does not exist"

yet when I look at the relations it is there.

               List of relations
 Schema |         Name         | Type  | Owner
--------+------------------+------+------
 public | UpdatePC's           | table | bob
 public | lkpBuildings           | table | bob
 public | lkpCPU                 | table | bob
.......

public | tblWorkstation        | table | bob
(23 rows)


Bob