StartThread problem

[vegito93]

well, this is mainly my code that i put together:

int userThreadID = 0; 
static char userThreadStack[16*1024] __attribute__((aligned(16))); 

#define MAX_ARGS 16 
#define MAX_ARGLEN 256 

struct argData 
{ 
    int flag;                     // Contains thread id atm 
    int argc; 
    char *argv[MAX_ARGS]; 
} __attribute__((packed)) userArgs; 

const char *testmode = "rom0:TESTMODE"; 
t_ExecData elfdata; 
static int 
pkoLoadElf(char *path) 
{ 
    ee_thread_t th_attr; 
    int ret=0; 
    int pid; 


SifLoadElf(path, &elfdata); 
    

    

    FlushCache(0); 
    FlushCache(2); 

    


    th_attr.func = (void *)elfdata.epc; 
    th_attr.stack = userThreadStack; 
    th_attr.stack_size = sizeof(userThreadStack); 
    th_attr.gp_reg = (void *)elfdata.gp; 
    th_attr.initial_priority = 64; 

    pid = CreateThread(&th_attr); 
  
    

    return pid; 
} 


int main(int argc, char **argv) 
{ 

int pid=-1,ret; 
pkoLoadElf(testmode); 
FlushCache(0); 
        FlushCache(2); 

        userThreadID = pid; 

        userArgs.argc=1; 
        userArgs.argv[0]=testmode; 
        userArgs.flag = (int)&userThreadID; 

        ret = StartThread(userThreadID, &userArgs); //Returns -1 
        if (ret < 0) 
        { 
                
                LoadExecPS2("", 0, NULL); 
                } 
     SleepThread; 

   return 0; 
}

As u can see. I am trying to creat a new thread for TESTMODE and start the thread. Everything goes fine until StartThread is called.It returns -1 and launches the Ps2browser.Whats wrong. Someone plz help me out !!!