border="2" width="auto" cellspacing="4" cellpadding="3" rules="all" style="margin:1em 1em 1em 0; border:solid 1px #AAAAAA; background-color:#F8F8FF"

Use

Type {{Wikitable}} instead of class="wikitable"

REMEMBER: "wikitable" is not available in this wiki

Example

{| {{en/Wikitable}}
|- style="background:#efefef"
! Title1
! Title2
|-
| AAA
| BBB
|-
| CCC
| DDD
|}

result:

And without wikitable:

{|
|- style="background:#efefef"
! Title1
! Title2
|-
| AAA
| BBB
|-
| CCC
| DDD
|}

result: