Comma missing in Execute Non Query

[hss]

@Dave

“insert into table_name( col1, col2, col3, col4, col5, create_date, created_by ) values( 00,0, '”+variable_1+“', '”+system.Environment.UserName+“', 'New’, TO_DATE(‘23-04-49 20:18:07’,‘DD-MM-YY HH24:MI:SS’), '”+system.Environment.MachineName+“')”

@Dave
It is showing me new error now
Execute Non Query: ORA-01756: quoted string not properly terminated