Please help debug

I just included the relavent portions of the program.  My errors seem to be in my enqueue function.

The errors are syntactical.  I need a second set of eyes to determine where the errors are.

Two parse errors and two data misrepresentations...
Thank you!



typedef struct Data /*struct*/
{
  unsigned char byte;
  struct Data *next;
}data;
.
.
.
int enqueue(data **head, data **tail, unsigned char data)
{    /*This adds the data byte to the que.*/

  data *hold,*new;   /*Placeholders*/

  if(*head==NULL)    /*If que is empty.*/
    {
      new=(data *) malloc(sizeof(data));
      if(new==NULL)    /*if no memory allocated.*/
{
  printf("No Memory Allocated, enqueue.nn");
  return(1);
}

      new->byte=data;
      new->next=NULL;   //copies over and sets up.
      *head=new;
      *tail=new;
      return(0);
    }

  if(*head!=NULL)   //otherwise que is full.
    {
      new=(data *) malloc(sizeof(data));
      hold=*head;
      new->byte=data;   //Add data byte to que.
      new->next=hold;
      *head=new;
    }
}/*end enqueue*/


int dequeue(data **head, data **tail)
{  /*Deletes the que.*/

  data *temp,*hold;

  if(*tail==NULL)    /*que already empty.*/
    {
      return(-1);
    }

  if(*head == *tail)   /*if que only has one left.*/
    {
      free(head);
      *head=NULL;
      *tail=NULL;
      return(-1);  
    }
  else                    /*goes through que to get to the tail.*/
    {
      temp=*head;
      while(temp->next != *tail)
{
  temp=temp->next;
}
      temp->next=NULL;
      free(tail);            /*cuts off the last variable. */
      *tail=temp;
      return(1);
    }
}/*end dequeue*/
prompt@psi >cat new.cpicogcc -o new

new.c: In function `enqueue':
new.c:309: `hold' undeclared (first use in this function)
new.c:309: (Each undeclared identifier is reported only once
new.c:309: for each function it appears in.)
new.c:309: `new' undeclared (first use in this function)
new.c:313: parse error before `)'
new.c:329: parse error before `)'
prompt@psi >exit