the bind value at index 1 is null

delet_btn.setOnClickListener(new View.OnClickListener() {
			
			@Override
			public void onClick(View arg0) {
				// TODO Auto-generated method stub
				try{
			pass=delet_edtt.getText().toString();
			DOP=new DatabaseOperations(CTX);
			Cursor CR=DOP.getUserPass(DOP, USERNAME);
			CR.moveToFirst();
			boolean login_status=false;
			String NAME="";
			if( delet_edtt.getText().toString().trim().length()==0)
			{
						Toast.makeText(getBaseContext(), "Please Enter password", Toast.LENGTH_LONG).show();
			}
			else{
			do{
				if(USERNAME!=null)
				{
			if(pass.equals(CR.getString(0)))
			{
				login_status=true;
			}
				}
			}while(CR.moveToNext());
			
			if(login_status)
			{
			//delet user
				
				DOP.deleteUser(DOP, USERNAME, pass);
				Toast.makeText(getBaseContext(), "Account removed successfully....", Toast.LENGTH_LONG).show();
				}
			
			
			else
			{
				Toast.makeText(getBaseContext(), "Invalid user password....try with correct password", Toast.LENGTH_LONG).show();
				finish();
			}
			}
			}
			
			
			catch(Exception e)
			{
				Toast.makeText(getBaseContext(), e.getMessage(), Toast.LENGTH_LONG).show();
			}
			}
		});
		 
	}
}

public class DatabaseOperations extends SQLiteOpenHelper {
	public static final int database_version=1;
	public String CREATE_QUERY= "CREATE TABLE "+TableInfo.TABLE_NAME+"("+ TableInfo.USER_NAME+" TEXT,"+TableInfo.USER_PASS+" TEXT);";
	//public String CREATE_QUERY = "CREATE TABLE "+ TableData.TableInfo.TABLE_NAME+"("+ TableData.TableInfo.USER_NAME+" TEXT,"+ TableData.TableInfo.USER_PASS+" TEXT,"+TableData.TableInfo.USER_EMAIL+" TEXT);";
	public DatabaseOperations(Context context) {
		super(context, TableInfo.DATABASE_NAME, null, database_version);
		Log.d("Database operations","Database created");
		// TODO Auto-generated constructor stub
	}

	@Override
	public void onCreate(SQLiteDatabase sdb) {
		// TODO Auto-generated method stub
	sdb.execSQL(CREATE_QUERY);	
	Log.d("Database operations","Table created");
	}

	@Override
	public void onUpgrade(SQLiteDatabase arg0, int arg1, int arg2) {
		// TODO Auto-generated method stub

	}
	public void putInformation(DatabaseOperations dop,String name,String pass)
	{
		SQLiteDatabase SQ=dop.getWritableDatabase();
		ContentValues cv=new ContentValues();
		cv.put(TableInfo.USER_NAME, name);
		cv.put(TableInfo.USER_PASS,pass);
	long k=	SQ.insert(TableInfo.TABLE_NAME, null, cv);
	Log.d("Database operations","one raw inserted");
	}
	
public Cursor getInformation(DatabaseOperations dop)
{
SQLiteDatabase SQ=dop.getReadableDatabase();
String[] columns={TableInfo.USER_NAME,TableInfo.USER_PASS};
Cursor CR=SQ.query(TableInfo.TABLE_NAME, columns, null, null, null, null, null);
return CR;
}
public Cursor getUserPass(DatabaseOperations DOP,String user)
{
	SQLiteDatabase SQ=DOP.getReadableDatabase();
	String selection=TableInfo.USER_NAME +" LIKE ?";
	String columns[]={TableInfo.USER_PASS};
	String args[]={user};
	Cursor CR=SQ.query(TableInfo.TABLE_NAME, columns, selection, args, null, null, null);
	return CR;
}
public void deleteUser(DatabaseOperations DOP,String user,String pass)
{
String selection=TableInfo.USER_NAME +" LIKE ? AND "+TableInfo.USER_PASS +" LIKE ?";
String columns[]={TableInfo.USER_PASS};
String args[]={user,pass};
SQLiteDatabase SQ=DOP.getWritableDatabase();
SQ.delete(TableInfo.TABLE_NAME,selection,args);
}
}