I can't install Snow Leopard on MacBook after Tiger

hi everyone,
i apologise if i created this topic on wrong discussion forum;
i have a major problem -- there was 10.4.9 Tiger system on my MacBook. so i erased it to install new clean 10.6; i restarted my computer and during the installation there was a message:
"Mac OS X can't be installed on this computer. This disc requires that Mac OS X 10.5 or later already be installed".
what to do? i don't have 10.5 and just want to install 10.6;

Make sure 10.6 you have looks like * Any other Snow Leopard will not install on a Mac that has 10.4.9 installed. It might work better, if you upgrade to 10.4.11 combo Intel first.
- * Links to my pages may give me compensation.

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      1. Open Disk Utility from the Utilities folder.
      2. Select the destination volume from the left side list.
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