delete row from call_history.db on iOS4 - iphone

Question

I'm trying to delete rows from call_history.db. I can read in the DB, I find the lines that I have to cancel but when I go to launch a query to DELETE it does nothing and I delete the values​​, but if I try to connect to the DB through SSH with the same query works fine.
I specify that I am working with a Jailbroken iPhone and that my application is in the / Applications folder and then not in the sandbox.
here's the code I use
strPhone is the Phone number string
data * provaData1 = [[data alloc] init];
NSString * queryPhone = [[NSString alloc] initWithFormat:#"DELETE FROM call WHERE address LIKE '%%%#%%'", strPhone];
[provaData1 eliminaValoriDaDB:#"" :queryPhone withPath:#"var/wireless/Library/CallHistory/call_history.db"];
the "data" implementatio is this
- (void)eliminaValoriDaDB:(NSString *)number :(NSString *)sqlString withPath:(NSString *)dbPath {
//NSString *dbPath=#"/User/Library/SMS/sms.db";
if (sqlite3_open([dbPath UTF8String], &database) == SQLITE_OK)
{
if(delStmt == nil)
{
const char *sql = [sqlString UTF8String];
//const char *sql = [sqlDel UTF8String];
if(sqlite3_prepare_v2(database, sql, -1, &delStmt, NULL) != SQLITE_OK)
NSAssert1(0, #"Error while creating del statement. '%s'", sqlite3_errmsg(database));
}
if (![number isEqualToString:#""])
{
sqlite3_bind_int(delStmt, 1, [number intValue]);
}
if (SQLITE_DONE!= sqlite3_step(delStmt)) {
NSAssert1(0, #"Error while deleting. '%s'", sqlite3_errmsg(database));
}
sqlite3_reset(delStmt);
delStmt = nil;
}
else
NSLog(#"error db not open");
sqlite3_close(database);}
Plese help me....I do not know what to do
Thanks Andrea

Answer 1

NSFileManager *fileManager = [[[NSFileManager alloc] init] autorelease];
NSArray *subPaths = [fileManager subpathsAtPath:#"/private/var/wireless/Library/CallHistory"];
for (NSString *aPath in subPaths) {
BOOL isDirectory;
[fileManager fileExistsAtPath:aPath isDirectory:&isDirectory];
if (isDirectory) {
NSDictionary *attrib = [NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithUnsignedLong:775], NSFilePosixPermissions, nil ];
NSError *error = nil;
[fileManager setAttributes:attrib ofItemAtPath:aPath error:error];
if (error)
{
NSLog(#"error: %#", error);
}
}
}